Main entry: core
Definition: a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
Main entry: core
Definition: the chamber of a nuclear reactor containing the fissile material where the reaction takes place
Main entry: core, magnetic core
Definition: (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories
Usage: each core has three wires passing through it, providing the means to select and detect the contents of each bit
Main entry: gist, heart, heart and soul, nub, nitty-gritty, essence, core, centre, center, pith, meat, inwardness, kernel, marrow, substance, sum
Definition: the choicest or most essential or most vital part of some idea or experience
Usage: the gist of the prosecutor's argument; the heart and soul of the Republican Party; the nub of the story
Main entry: core, effect, gist, essence, burden
Definition: the central meaning or theme of a speech or literary work
Main entry: nucleus, core, core group
Definition: a small group of indispensable persons or things
Usage: five periodicals make up the core of their publishing program
Main entry: Congress of Racial Equality, CORE
Definition: an organization founded by James Leonard Farmer in 1942 to work for racial equality
Main entry: core
Definition: the center of an object
Usage: the ball has a titanium core
Main entry: core
Definition: the central part of the Earth
Main entry: core
Definition: a cylindrical sample of soil or rock obtained with a hollow drill
Main entry: core
Definition: remove the core or center from
Usage: core an apple